The story centers around Kio Kakazu , a high school freshman living in Okinawa. During a memorial service for one of his family ancestors. A mysterious girl with cat ears appears before him indroducing herself as Eris and claiming that she is an alien. However She be more troubling than he first realizes.
The Animation & Character Design is good and as a cat-lover I like Cat-ear Alien. :D
Beside, The voice actresses from this anime are my favorite!!, Haruka Tomatsu(Nagi from Kannagi, Lala form To Love Ru, Aoba from Cross Game) and Kana Hanazawa (Zange from Kannagi, Mikan from To Love Ru, Anri from Durarara)
However, I think the base story is too simple but I still hope that its will have more interested in late chapter.